How To Fix DGA129 - A data record with this key already exist

DGA129 - Overview

• Message type: E = Error

• Message class: DGA - DG: Messages for Dangerous Goods Management (A)

• Message number: 129

• Message text: A data record with this key already exist

What causes this issue?

You attempted to create a data record with a key that already exists.

System Response

The system cannot create the new data record.

How to fix this error?

In order to create a data record, all other data records with the same
logical key must be deleted beforehand.
If the data record that already exists has a deletion indicator, you
can remove the deletion indicator in order to reactivate the data
record.

Error message extract from SAP system. Copyright SAP SE.

DGA129 - Details

• The SAP error message DGA129, which states "A data record with this key already exists," typically occurs when you are trying to create or insert a new record in a database table, but a record with the same key already exists. This can happen in various contexts, such as during data entry, data uploads, or when executing certain transactions.
  
  Cause:
  
  Duplicate Key: The most common cause is that the key you are trying to use for the new record already exists in the database. This could be a primary key or a unique key constraint violation.
  Data Upload Issues: If you are uploading data (e.g., through LSMW, BAPIs, or other data migration tools), the source data may contain duplicates.
  Incorrect Logic in Custom Programs: If you are using custom ABAP programs or enhancements, there may be logic that does not properly check for existing records before attempting to create a new one.
  Concurrent Transactions: If